Magneto-Optical Observation of CPP-GMR Device With Perpendicular Magnetic Anisotropy Driven by Spin Transfer Switching Using Transparent Top Electrode

Funabashi, Nobuhiko; Aoshima, Ken-ichi; Machida, Kenji; Kimura, Kiyoshi; Ishibashi, Takayuki; Shimidzu, Naoki

doi:10.1109/tmag.2010.2042287

Cited by 5 publications

(2 citation statements)

References 11 publications

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“…The utilization of materials with tilted and/or PMA in STT devices has shown, both theoretically and experimentally, faster switching, lower switching current, enhanced thermal stability, and low-to zerofield operation in STOs, than their fully in-plane magnetized counterparts. [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16] Finally, the all-magnetic nature of Ni/Co MLs also allows for a unique combination of high spin polarization, high spin-torque efficiency, and easily tunable PMA.…”

Section: Introductionmentioning

confidence: 99%

Temperature-dependent interlayer coupling in Ni/Co perpendicular pseudo-spin-valve structures

et al. 2011

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The temperature-dependent coupling mechanisms in perpendicular pseudo-spin valves based on the following structure, [Ni/Co] 5 /Cu(t Cu )/[Ni/Co] 2 , are investigated. Despite a thick (t Cu 3 nm) Cu spacer, room-temperature measurements reveal complete coupling of the [Ni/Co] 5 and [Ni/Co] 2 multilayers. This coupling can be attributed to strong long range magnetostatic stray fields that penetrate the spacer layer. This results in magnetic domain imprinting and vertically correlated domains throughout the reversal process. Surprisingly, when the temperature is reduced, a complete decoupling is observed. This somewhat counterintuitive result can be explained by a large difference in the [Ni/Co] 5 and [Ni/Co] 2 multilayer coercivities at reduced temperatures, which then impedes domain imprinting and promotes decoupling. Finally, the decoupling temperature is found to increase with spacer thickness.

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Section: Introductionmentioning

confidence: 99%

Temperature-dependent interlayer coupling in Ni/Co perpendicular pseudo-spin-valve structures

et al. 2011

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“…Our results demonstrated that the addition of plasmonic Au layer to the magnetic active Co layer is effective in terms of R and θ in submicron-scaled MO device such as magnetooptical spatial light modulator for realizing the holographic 3D movies. 31,32) (a) (b)…”

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confidence: 99%

Plasmon assisted improvement of figure of merit of magneto-optical Kerr effect in Au/Co/Au multilayered nanorectangular patch array

Kikuchi

Tanaka

2018

Jpn. J. Appl. Phys.

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We observed the significant improvement of the figure of merit (FOM) of the longitudinal magneto-optical Kerr effect in Au/Co/Au multilayered nano rectangular patch array, in which local-mode surface plasmons were resonantly excited by the light irradiation. To demonstrate the advantage of the plasmon excitation, we compared the FOMs in both Au/Co/Au and bare Co nanostructure. Our results clearly show that the incorporation of plasmonic Au structure to magnetic Co layer is effective not only to increase rotation angle in the longitudinal magneto-optical Kerr effect but also to improve the FOM through the highly reflectance of Au.

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Low-current-density spin-transfer switching in Gd22Fe78-MgO magnetic tunnel junction

Kinjo

Machida

Matsui

et al. 2014

Journal of Applied Physics

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Magnetization switching of a relatively thick (9 nm) Gd-Fe free layer was achieved with a low spin injection current density of 1.0 × 106 A/cm2 using MgO based magnetic tunnel junction devices, fabricated for light modulators. At about 560 × 560 nm2 in size, the devices exhibited a tunneling magnetoresistance ratio of 7%. This low-current switching is mainly attributed to thermally assisted spin-transfer switching in consequence of its thermal magnetic behavior arising from Joule heating.

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Magneto-Optical Observation of CPP-GMR Device With Perpendicular Magnetic Anisotropy Driven by Spin Transfer Switching Using Transparent Top Electrode

Cited by 5 publications

References 11 publications

Temperature-dependent interlayer coupling in Ni/Co perpendicular pseudo-spin-valve structures

Temperature-dependent interlayer coupling in Ni/Co perpendicular pseudo-spin-valve structures

Plasmon assisted improvement of figure of merit of magneto-optical Kerr effect in Au/Co/Au multilayered nanorectangular patch array

Low-current-density spin-transfer switching in Gd22Fe78-MgO magnetic tunnel junction

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